Pterospora: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 

	stem with an enlarged bulb-like base
	stem sticky
	petals united; NOT [petals distinct]
	raceme 1-3 dm long; NOT [flowers solitary or in a short raceme]
	anthers with deflexed awns; NOT [anthers awnless]

Monotropaceae: Answers to key questions in Budd's Flora  leading to this family. 

	herbs; NOT [shrubs or trees]
	plants parasitic or saprophytic, without chlorophyll; NOT [plants green or with some chlorophyll]
	plants growing out of soil or attached to roots of other plants; NOT [plants twining and attached to stems of other plants]
	flowers with two floral rings, but with the petals wholly or partly united forming a tube or bell
	corolla regular; NOT [corolla 2-lipped]
	stamens 6-10; NOT [stamens 4]